JPH04116022U - Constant velocity joint boot mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to simplify the structure for attaching a hard synthetic resin boot to a constant velocity joint. [Structure] A protrusion 23 is formed on the edge of the fitting part 21 of the boot 20, and an engaging part 24 is formed at the inner end of the fitting part 21 along the corner part of the mounting part 26. The press-fitting part 28 is press-fitted into the outer diameter surface of the mounting part 26', and the pressing part 29, which is integrated with the press-fitting part 28, is caulked to the outer diameter surface of the boot 20.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to a boot mounting structure for a constant velocity joint.

0002

[Conventional technology]

Figure 6 shows the boot mounting structure of a constant velocity joint that has been commonly used. ing. In the figure, 1 is the outer ring of the constant velocity joint, 2 is the inner ring, 3 is the rolling element, 4 is the cage, 5 is an inner ring shaft. The boot 6 is made of hard synthetic resin and has a bellows shape. Ru. In addition, boot mounting portions 7 and 8 are provided on the outer diameter surface of the outer ring 1 and the outer diameter surface of the inner ring shaft 5, respectively. A plurality of sharp protrusions 9 are formed on each boot mounting portion 7, 8.

0003 The large diameter side and small diameter side ends of the boot 6 are connected around the boot mounting parts 7 and 8, respectively. A metal band 10, 10' is fitted around the metal band 10, 10'. By caulking the Ω-shaped protrusions 11 and 11' with a tool, the boot 6 is attached to the outer ring. 1 and the inner ring shaft 5.

0004

[Problem that the idea aims to solve]

According to the conventional boot mounting structure as described above, the cost of the bands 10, 10' is low. high, low work efficiency due to difficulty in automatic movement, protrusions 11, 11 ’ protrudes outward, which is disadvantageous in terms of installation space, and the protruding portion There are problems such as the possibility that the parts 11 and 11' may interfere with peripheral parts.

[0005] Therefore, this idea solved the above problems by improving the boot mounting structure on the outer ring side. The task is to erase it.

[0006]

[Means to solve the problem]

In order to solve the above problem, this invention has been developed to separate both ends of the synthetic resin boot. Boot installation of the constant velocity joint attached to each attachment point on the outer diameter surface of the outer ring and the outer diameter surface of the inner ring shaft. In the structure, it fits into the mounting portion of at least one of the outer ring outer diameter surface and the inner ring shaft outer diameter surface. A round fitting part is provided at the end of the boot, and a protrusion protruding outward is formed at the outer end of the fitting part. At the same time, an engaging part is formed at the inner end along the corner part of the mounting part, and an annular shape is formed. Press-fit the press-fitting part of the boot fixing fitting into the outer diameter surface of the mounting part, and press the pressing part that is integrated with the press-fitting part. Press the outer diameter surface of the above fitting part of the boot, and insert the above into the groove formed on the inner diameter surface of the pressed part. It has a structure in which protrusions are fitted together.

[0007]

[Effect]

The fitting part of the boot is pressed against the outer diameter surface of the constant velocity joint's mounting part by the pressing part of the fixing fitting. Pressed by In addition, the protrusion on the edge of the fitting part fits into the groove of the pressing part, and the fitting The engaging part of the part engages with the corner part of the mounting part. This allows the boot to move with constant velocity. mounted on the main body.

[0008]

【Example】

The mounting structure of the embodiment shown in FIGS. 1 and 2 has a fitting part 21 on the large diameter side of the boot 20. The structure is shown when attached to the outer diameter surface of the outer ring 22 of a constant velocity joint.

[0009] The boot 20 is made of hard synthetic resin and has a bellows shape as in the past, but has a large diameter. A protrusion 23 protruding outward is provided on the outer diameter surface of the end edge of the side cylindrical fitting part 21 over the entire circumference. It is formed. Further, the boot 20 is attached to the part where the fitting part 21 moves from the inner end to the bellows part. An engaging portion 24 is formed that is curved in a direction in which the diameter decreases.

0010 Three sharp protrusions 25 in the circumferential direction are formed on the outer diameter surface of the outer ring 22 of the constant velocity joint. A mounting portion 26' having a smaller diameter is provided inside the mounting portion 26.

[0011] The fixing fitting 27 has a cylindrical press-fitting part 28 that is press-fitted around the above-mentioned mounting part 26'. The tip of the press-fitting part 28 is abutted against the stage of the mounting part 26' and positioned. Ru. The rear end of the press-fit part 28 rises outward at 90 degrees, leaving a slight gap above the press-fit part 28. The folded portion is then folded back, and the folded portion becomes the pressing portion 29. of the pressing part 29 A groove 30 is formed on the inner diameter surface.

0012 As shown in FIGS. 2 and 3, the above-mentioned pressing portion 29 extends in the outer radial direction from the press-fitting portion 28. Radial slits 31 are made in advance at the required intervals on the part that protrudes at a 90 degree angle. After press-fitting the press-fitting part 28 into the mounting part 26', the fitting part of the boot 20 is It is formed by folding back and caulking on the outer diameter surface of 21 as shown by the arrow. The slit 31 is provided to facilitate bending when crimping the pressing part 29. .

[0013] By this caulking, when the protrusion 23 of the fitting part 21 of the boot 20 is fitted into the groove 30, At the same time, the pressing part 29 presses the inner diameter surface of the fitting part 21 against the protrusion 25, and furthermore, the engagement The portion 24 is engaged with a corner portion between the outer diameter surface and the end surface of the outer ring 22.

[0014] Note that the fixing fitting 27 has a pressing part 29 parallel to the press-fitting part 28, as shown in FIG. It is bent into a U-shape in advance so that the press-fitting part 28 is press-fitted into the mounting part 26. After that, by caulking the pressing part 29 with the caulking tool 32, the shape shown in FIGS. 1 and 2 is formed. Finish the structure. In this case, the slit 31 described above may be omitted.

[0015] With the above configuration, the fitting portion 21 of the large diameter portion of the boot 20 is not attached to the outer ring 22. It will be done.

[0016] In another embodiment shown in FIG. It is bent to form the pressing part 29, and the boot is pressed by the same action as in the above case. A fitting portion 21 on the large diameter side of the tooth 20 is attached to the outer ring 22. In this case as well, The lit 31 can be omitted.

[0017] Note that the mounting structure of the small-diameter side fitting portion of the boot 20 to the inner race shaft is not shown. However, it can be installed using a structure similar to that described above or a conventional structure (see Figure 6). It will be done. In addition, the above-mentioned mounting structure is used only for mounting to the inner ring shaft, and the mounting structure for the outer ring is Conventional mounting structures may be used for mounting.

[0018]

[Effect of the idea]

As mentioned above, this invention is effective at least at the large-diameter side fitting part or the small-diameter side fitting part of the boot. A protrusion and an engaging part are formed on one side, and the outer ring or inner ring shaft corresponding to these fitting parts is formed on one side. Press fit the fixing metal fitting into the mounting part, and put the pressing part of the fixing metal around the fitting part of the boot. The crimping prevents the boots from slipping out. The caulking work becomes easy and can be automated. Also, the fixing hardware is low cost. Since there are no protruding parts like in conventional models, there are no problems with installation space. stomach.

[Brief explanation of drawings]

[Figure 1] Partial cross-sectional view of the embodiment

[Figure 2] Partial perspective view of the same as above

[Figure 3] Partial cross-sectional view of the above during production

[Fig. 4] Partial cross-sectional view during production using another method same as above

[Fig. 5] Partial sectional view of another embodiment

[Fig. 6] Partial cross-sectional view of conventional example

[Explanation of symbols]

20 boots 21 Fitting part 22 Outer ring 23 Projections 24 Engagement part 25 Projections 26, 26’ Mounting part 27 Fixing metal fittings 28 Press-fitting part 29 Pressing part 30 Groove 31 slit

Claims (1)

[Scope of utility model registration request] Claim 1: A boot mounting structure for a constant velocity joint in which both ends of a synthetic resin boot are attached to the respective mounting portions of an outer ring outer diameter surface and an inner ring shaft outer diameter surface, wherein the outer ring outer diameter surface and the inner ring shaft outer diameter A fitting part that fits into the fitting part on at least one of the surfaces is provided at the end of the boot, and an outwardly protruding protrusion is formed on the outer end of the fitting part, and a fitting part along the corner part of the fitting part is formed on the inner end. The press-fitting part of the annular boot fixing fitting is press-fitted into the outer diameter surface of the fitting part, and the pressing part integrated with the press-fitting part is pressed against the outer diameter surface of the fitting part of the boot. A boot mounting structure for a constant velocity joint, characterized in that the above-mentioned protrusion is fitted into a groove formed on the inner diameter surface of the pressing part.